U.S. stocks are experiencing significant gains with the S&P 500 and the Dow Jones Industrial Average both achieving record high closes. The S&P 500 surged past 6,500 for the first time, bolstered by positive economic indicators including a surprise jump in GDP. Despite mixed performances from prominent tech stocks like Nvidia, which slipped after earnings, overall market sentiment remains strong as investors remain optimistic about the resilience of the U.S. economy. Additionally, various sectors are showing gains, indicating a favorable environment for equities as key inflation data approaches.